Officials say state monitoring also has shown that more than 150 other streams and stream segments are clean enough to stay off the list due largely to good conservation practices being implemented on the land.

Conservation officials say the water quality success is the result of voluntary, locally led conservation work supported by the EPA's Clean Water Initiatives, state conservation funds and federal conservation programs that allow farmers, ranchers and other landowners to address non-point source pollution throughout Oklahoma

They say the outcomes show the efforts are paying huge dividends in the form of cleaner water and a healthier environment.